Principal Mechanical Engineer

Principal Mechanical Engineer – London (Hybrid Working)

Location: Central London
Salary: £60,000 – £70,000 + Excellent Benefits
Type: Permanent

We’re looking for an experienced Mechanical Engineer to join a growing building services consultancy in London as a Principal Mechanical Engineer. This is your chance to take ownership of complex, high-profile projects and play a key role in delivering innovative, sustainable building services solutions across commercial, healthcare, retail, and residential developments.

Role Overview

As a Principal Mechanical Engineer, you’ll lead the design and delivery of mechanical services projects from concept to completion. You’ll manage client relationships, guide design teams, and ensure projects meet technical, regulatory, and performance standards. Your expertise will shape the solutions we deliver while mentoring junior engineers and fostering best practice across the team.

What You’ll Do

• Take the lead on multidisciplinary mechanical building services projects.

• Manage client interactions and collaborate effectively with architects, engineers, and contractors.

• Ensure design quality, compliance, and technical excellence throughout project delivery.

• Mentor and support junior engineers, sharing knowledge and guidance.

• Drive innovation and implement best practice within the mechanical team.

• Contribute to recruitment, retention, and professional development of engineering talent.

• Represent the company at industry events and maintain strong professional networks.

Who We’re Looking For

• Degree-qualified in Mechanical or Building Services Engineering (or equivalent).

• Chartered or working towards Chartered Status.

• Significant experience delivering mechanical building services projects in regulated sectors.

• Proven ability to lead design teams and influence engineering outcomes.

• Proficient in MagiCAD, Relux, Amtech/EOM, AutoCAD, and Revit.

• Strong communication and interpersonal skills, confident engaging with clients and stakeholders.

• Proactive, collaborative, and passionate about delivering technically excellent and sustainable solutions.

Why Join Us

• Competitive salary with annual reviews.

• Hybrid working – flexible balance of office and home-based work.

• 26 days holiday (rising to 31 with loyalty days) plus bank holidays.

• Access to excellent training, mentoring, and professional development.

• Opportunity to work on high-profile, innovative projects in London and nationwide.

• Client-facing experience with scope to support business development.

• Collaborative, inclusive, and supportive team culture.

• Clear career progression opportunities to senior leadership roles.

Apply Today

Take the next step in your career and join a consultancy delivering technically excellent, sustainable projects across London and the UK.

Apply now or contact us for a confidential discussion about this Principal Mechanical Engineer role in London.